How often do you guys replace spark plugs on your HHRs? The last time I replaced mine was about 60k miles ago when the old one had 75k miles on them.

 

Factory says 100K miles... I haven't done mine yet.

 

I changed mine at 81k , I know book says 100k

 

Every 100,000 miles, with 41-103 Iridium AC Delco plugs.

 

By the book, at this rate it may be 50 years till I hit 100K.

 

Yes the book says 100k. But just for grins pull one out at 90k. Not so nice looking. Even by then the electrode is getting shorter. It would not hurt a thing to change them a little early. On my HHR I think I did mine at 97 because I knew I wasn't going to have time when it was going to hit 100k.

How many remember changing them once a year? Along with the rotor and points. My, you haven't lived until you've set dwell and timing.

 

In real life, of course it’s your ride , change them when you feel the need to.

 

My built 225 slant six was every 6 months... It was worth it though. Just the look on the guy's face when you smoked his small block chevy or ford and then lifted the hood and showed off that inline 6... priceless.

 

X2 - it's basically change them when you want - or change them when they cause a problem - or change them at the recommended interval as per the owners manual.

 

But if you change the, don’t change the plugs, AC Delco 41-103 Iridium, only!!